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What is this little creature??

After a lot of help from people at different newsgroups.
I found out it was a Damsel Fly Larvae

Today I caught this little thing in my wifes 54 liter tank.
I would like to have it identified, if someone knows what it is.
It was about 1.2 cm. long, and had a split tale (got removed while catching it)

The fish in the tank are:

Red neon

Otocinclus Arnoldi

Some tiny Rasbora

And 10 Amano Scrimps (caridina japonica)